﻿using System;
using System.CodeDom;
using System.Collections.Generic;
using System.IO;
using System.Linq;
using System.Security.Cryptography;
using System.Text;
using System.Threading.Tasks;

namespace Client.Util
{
    /// <summary>
    /// Author: Leil
    /// Description: MD5Util
    /// CreateTime: 2020/6/1 16:15:48
    /// </summary>
    public class MD5Util
    {

        public static string MD5Encrypt(string strSource)
        {
            try
            {
                byte[] bytIn = System.Text.Encoding.Default.GetBytes(strSource);
                //建立加密对象的密钥和偏移量           
                byte[] iv = { 102, 16, 93, 156, 78, 4, 218, 32 };//定义偏移量   
                byte[] key = { 55, 103, 246, 79, 36, 99, 167, 3 };//定义密钥   
                                                                  //实例DES加密类   
                DESCryptoServiceProvider mobjCryptoService = new DESCryptoServiceProvider();
                mobjCryptoService.Key = iv;
                mobjCryptoService.IV = key;
                ICryptoTransform encrypto = mobjCryptoService.CreateEncryptor();
                //实例MemoryStream流加密密文件   
                System.IO.MemoryStream ms = new System.IO.MemoryStream();
                CryptoStream cs = new CryptoStream(ms, encrypto, CryptoStreamMode.Write);
                cs.Write(bytIn, 0, bytIn.Length);
                cs.FlushFinalBlock();

                string strOut = System.Convert.ToBase64String(ms.ToArray());
                return strOut;
            }
            catch (Exception e)
            {

                Console.WriteLine(e.Message);
            }
            return string.Empty;
        }
        ///MD5解密
        public static string MD5Decrypt(string Source)
        {
            try
            {
                //将解密字符串转换成字节数组   
                byte[] bytIn = System.Convert.FromBase64String(Source);
                //给出解密的密钥和偏移量，密钥和偏移量必须与加密时的密钥和偏移量相同   
                byte[] iv = { 102, 16, 93, 156, 78, 4, 218, 32 };//定义偏移量   
                byte[] key = { 55, 103, 246, 79, 36, 99, 167, 3 };//定义密钥   
                DESCryptoServiceProvider mobjCryptoService = new DESCryptoServiceProvider();
                mobjCryptoService.Key = iv;
                mobjCryptoService.IV = key;
                //实例流进行解密   
                System.IO.MemoryStream ms = new System.IO.MemoryStream(bytIn, 0, bytIn.Length);
                ICryptoTransform encrypto = mobjCryptoService.CreateDecryptor();
                CryptoStream cs = new CryptoStream(ms, encrypto, CryptoStreamMode.Read);
                StreamReader strd = new StreamReader(cs, Encoding.Default);
                return strd.ReadToEnd();
            }
            catch (Exception e)
            {

                Console.WriteLine(e.Message);
            }
            return string.Empty;
        }




    }
}
